INSKCTS AND DISKASKS OF TIIK PKACII 



1105 



destroy all larvae. This practice slmnld not le followed later than 

 July 15. 



2. As soon as the back or wound is dry, an application of the 

 thickened line-sulphur solution recommended for the lesser peach 

 borer on page 1099 is made. The crown and about eighteen inches 

 of the trunk should be thoroughly whitewashed with the solution. 



3. As soon as the trees are dry, the soil is piled back against the 

 trees forming a mound about six or eight inches high (Fig. 351). 

 The mounding forces the female to deposit her eggs higher on 

 the trunk of the tree, thus 



causing more unfavorable 

 conditions for the larvae 

 and placing them in an 

 easier position to remove. 

 It also serves to prevent 

 frost injury (page 1113). 

 Many growers make the 

 serious mistake of leaving 

 the soil hoed away from 

 the crowns of the trees. 

 The mounds should be 

 made prior to August 1, 

 before the adult deposits 

 her eggs. 



It will be noticed that the pupa stage of this insect during the 

 years 1912, 1913, 1914, and 1915, varied somewhat, and that only 

 during the year 1913 did the pupa stage last over an extended 

 period of time. During the other three years the greatest number 

 of the larvae were in the pupa stage from August 3 to August 10. 

 It is believed therefore that many times the grower would have an 

 opportunity to kill large numbers of the pupae between August 1 

 and August 10. The writer has often removed the soil from the 

 crown of trees during this period of the four years and found 

 from one to seventeen living pupae. If trees on gravel or stony 

 loam soil have a serious infestation of the pest, it is rapid work 

 with a trowel or similar instrument to remove the soil, carefully 

 examining the same for the pupae. They are easily found es- 

 pecially if the soil is dry and loose. No cutting of the bark is 

 necessary. 



Fro. 351. MOUNDING OF PEACH TREES 

 TO ( iii:< K BORERS ~XT?D PRKVK.NT 

 FREEZING 



